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Imagick::getPixelRegionIterator

(PECL imagick 2.0.0)

Imagick::getPixelRegionIteratorGet an ImagickPixelIterator for an image section

Beschreibung

ImagickPixelIterator Imagick::getPixelRegionIterator ( int $x , int $y , int $columns , int $rows )

Get an ImagickPixelIterator for an image section.

Parameter-Liste

x

The x-coordinate of the region.

y

The y-coordinate of the region.

columns

The width of the region.

rows

The height of the region.

R├╝ckgabewerte

Returns an ImagickPixelIterator for an image section.

Fehler/Exceptions

Wirft ImagickException bei Fehlern.

Beispiele

Beispiel #1 Imagick::getPixelRegionIterator() example

Iterate over the pixels in the top left of the image, changing every other one to be transparent black.

<?php
$im 
= new Imagick(realpath("./testImage.png"));
$areaIterator $im->getPixelRegionIterator(001010);

foreach (
$areaIterator as $rowIterator) {
    foreach (
$rowIterator as $pixel) {
        if (
$column 2) {
            
// Paint every second pixel black
            
$pixel->setColor("rgba(0, 0, 0, 0)");
        }
    }
    
$areaIterator->syncIterator();
}
$im->writeImage("./output.png");
?>

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